柱状统计图

sql语句：

create database DBTest

go

use DBTest

go

create table VisiteCount

(

    id int identity(1,1) primary key not null,--自增列

    loginTime Datetime --访问时间

)



insert into VisiteCount values('2013-01-01');

insert into VisiteCount values('2013-02-01');

insert into VisiteCount values('2013-02-02');

insert into VisiteCount values('2013-03-01');

insert into VisiteCount values('2013-03-02');

insert into VisiteCount values('2013-03-03');

insert into VisiteCount values('2013-04-01');

insert into VisiteCount values('2013-04-02');

insert into VisiteCount values('2013-04-03');

insert into VisiteCount values('2013-04-04');

insert into VisiteCount values('2013-05-01');

insert into VisiteCount values('2013-05-02');

insert into VisiteCount values('2013-05-03');

insert into VisiteCount values('2013-05-04');

insert into VisiteCount values('2013-05-05');

insert into VisiteCount values('2013-06-01');

insert into VisiteCount values('2013-06-02');

insert into VisiteCount values('2013-06-03');

insert into VisiteCount values('2013-06-04');

insert into VisiteCount values('2013-06-05');

insert into VisiteCount values('2013-06-06');

insert into VisiteCount values('2013-07-01');

insert into VisiteCount values('2013-07-02');

insert into VisiteCount values('2013-07-03');

insert into VisiteCount values('2013-07-04');

insert into VisiteCount values('2013-07-05');

insert into VisiteCount values('2013-07-06');

insert into VisiteCount values('2013-07-07');

insert into VisiteCount values('2013-08-01');

insert into VisiteCount values('2013-08-02');

insert into VisiteCount values('2013-08-03');

insert into VisiteCount values('2013-08-04');

insert into VisiteCount values('2013-08-05');

insert into VisiteCount values('2013-08-06');

insert into VisiteCount values('2013-08-07');

insert into VisiteCount values('2013-08-08');

insert into VisiteCount values('2013-09-01');

insert into VisiteCount values('2013-09-02');

insert into VisiteCount values('2013-09-03');

insert into VisiteCount values('2013-09-04');

insert into VisiteCount values('2013-09-05');

insert into VisiteCount values('2013-09-06');

insert into VisiteCount values('2013-09-07');

insert into VisiteCount values('2013-09-08');

insert into VisiteCount values('2013-09-09');

insert into VisiteCount values('2013-10-01');

insert into VisiteCount values('2013-10-02');

insert into VisiteCount values('2013-10-03');

insert into VisiteCount values('2013-10-04');

insert into VisiteCount values('2013-10-05');

insert into VisiteCount values('2013-10-06');

insert into VisiteCount values('2013-10-07');

insert into VisiteCount values('2013-10-08');

insert into VisiteCount values('2013-10-09');

insert into VisiteCount values('2013-10-10');

insert into VisiteCount values('2013-11-01');

insert into VisiteCount values('2013-11-02');

insert into VisiteCount values('2013-11-03');

insert into VisiteCount values('2013-11-04');

insert into VisiteCount values('2013-11-05');

insert into VisiteCount values('2013-11-06');

insert into VisiteCount values('2013-11-07');

insert into VisiteCount values('2013-11-08');

insert into VisiteCount values('2013-11-09');

insert into VisiteCount values('2013-11-10');

insert into VisiteCount values('2013-11-11');

insert into VisiteCount values('2013-12-01');

insert into VisiteCount values('2013-12-02');

insert into VisiteCount values('2013-12-03');

insert into VisiteCount values('2013-12-04');

insert into VisiteCount values('2013-12-05');

insert into VisiteCount values('2013-12-06');

insert into VisiteCount values('2013-12-07');

insert into VisiteCount values('2013-12-08');

insert into VisiteCount values('2013-12-09');

insert into VisiteCount values('2013-12-10');

insert into VisiteCount values('2013-12-11');

insert into VisiteCount values('2013-12-12');

View Code

cs代码：

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Data.SqlClient;

using System.Configuration;

using System.Drawing;

using System.Drawing.Drawing2D;

using System.Data;



public partial class VisiteCount : System.Web.UI.Page

{

    public string connStr = ConfigurationManager.ConnectionStrings["VisitCountConnectionString"].ToString();

    protected void Page_Load(object sender, EventArgs e)

    {

        DrawLinearGradient();

    }



    //访问人数统计

    public int Total()

    {

        int result = -1;

        string sql = "select count(1) from VisiteCount";

        SqlConnection conn = new SqlConnection(connStr);

        conn.Open();

        SqlCommand cmd = new SqlCommand(sql, conn);

        result =Convert.ToInt32(cmd.ExecuteScalar());

        cmd.Dispose();

        conn.Close();

        return result;

    }



    //柱形图

    public void DrawLinearGradient()

    {

        int height = 400, width = 600;//定义画布长宽

        /*新建一个画布*/

        Bitmap image = new Bitmap(width, height); 

        //Graphics GDI+绘图的表面。即绘图的一个平台。

        Graphics g = Graphics.FromImage(image);



        /*绘制背景墙、网格线以及坐标*/

        g.Clear(Color.White);//清空背景

        //创建字体对象

        Font font = new Font("Arial",9,FontStyle.Regular);

        Font font1 = new Font("宋体",20,FontStyle.Bold);

        //创建一个矩形

        Rectangle rectangle = new Rectangle(0, 0, image.Width, image.Height);

        //创建一个线性渐变画笔。

        LinearGradientBrush brush = new LinearGradientBrush(rectangle, Color.Blue, Color.BlueViolet, 1.2f, true);

        //调用Graphics对象的FileRectangle方法在画布中绘制一个使用渐变图案填充的矩形。

        g.FillRectangle(Brushes.WhiteSmoke, 0, 0, width, height);

        g.DrawString("2013年各月份网站流量统计", font1, brush, new PointF(130, 30));



        /*画图片的边框线*/

        //绘制由坐标对、宽度和高度指定的矩形。

        g.DrawRectangle(new Pen(Color.Blue), 0, 0, image.Width - 1, image.Height - 1);

        

        /*绘制线条*/

        //绘制纵向线条

        int x = 100;

        Pen mypen = new Pen(brush,1); //用于绘制直线和曲线对象

        for (int i = 0; i < 11; i++)

        {

            g.DrawLine(mypen, x, 80, x, 340);

            x = x + 40;

        }

        Pen mypen1 = new Pen(Color.Blue, 2);

        g.DrawLine(mypen1, x - 480, 80, x - 480, 340);

        //绘制横向线条

        int y = 106;

        for (int i = 0; i < 9; i++)

        {

            g.DrawLine(mypen, 60, y, 540, y);

            y = y + 26;

        }

        g.DrawLine(mypen1, 60, y, 540, y);



        /*为已经绘制的坐标轴绘制数据标记。X轴显示月份，y轴显示百分比刻度*/

        //X轴

        string[] n = {"一月","二月","三月","四月","五月","六月","七月","八月","九月","十月","十一月","十二月"};

        x = 62;

        for (int i = 0; i < 12; i++)

        {

            g.DrawString(n[i].ToString(), font, Brushes.Black, x, 380);

            x = x + 40;

        }

        //y轴

        string[] m = {"100%","90%","80%","70%","60%","50%","40%","30%","20%","10%","0%"};

        y = 85;

        for (int i = 0; i < 11; i++)

        {

            g.DrawString(m[i].ToString(),font,Brushes.Black,25,y);//设置文字内容以及输出位置

            y = y + 25;

        }

        //将检索出的数据按一定比例绘制到图像中

        int[] count = new int[12];

        string sql = "";

        SqlConnection conn = new SqlConnection(connStr);

        conn.Open();

        SqlDataAdapter da;

        DataSet ds = new DataSet();

        for (int i = 0; i < 12; i++)

        {

            sql = @"select count(1) as count,Month(loginTime) as month from VisiteCount where YEAR(loginTime)=2013 and MONTH(loginTime)=" + (i + 1) + " group by MONTH(loginTime)";

            da = new SqlDataAdapter(sql, conn);

            da.Fill(ds, i.ToString());

            if (ds.Tables[i].Rows.Count == 0)

            {

                count[i] = 0;

            }

            else

            {

                //count[i] = Convert.ToInt32(ds.Tables[i].Rows[0][0].ToString())*100/Total();

                count[i] = Convert.ToInt32(ds.Tables[i].Rows[0][0].ToString());

            }

        }



        //显示柱状效果图

        x = 70;

        for (int i = 0; i < 12; i++)

        {

            //g.DrawString(count[i], font, Brushes.Red, x-5, 320 - count[i] * 26 / 10);

            string dble = (Convert.ToDouble(count[i])/Total()*100).ToString().Substring(0,4);

            g.DrawString(dble.ToString()+"%", font, Brushes.Red, x-5, 320 - (count[i]*100/Total()) * 26 / 10);

            SolidBrush mybrash = new SolidBrush(Color.Blue);

            g.FillRectangle(mybrash, x, 340 - (count[i] * 100 / Total()) * 26 / 10, 20, (count[i] * 100 / Total()) * 26 / 10);

            x = x+40;

        }



        //将绘制好的助兴图标显示在页面上

        System.IO.MemoryStream ms = new System.IO.MemoryStream();

        image.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);

        Response.ClearContent();

        Response.ContentType = "image/Jpeg";

        Response.BinaryWrite(ms.ToArray());

    }

}

View Code